• Immersion-type controllers that combine high limit protection with low limit and circulator control in forced hydronic heating systems
• Require 24 VAC thermostat with heat anticipator set at 0.2 amp (plus current draw of gas valve on L8124E)
• Include diaphragm powerhead and micro Switch assembly that respond to temperature changes in boiler water
• Mount directly to boiler
• Provide multi-zone control by using a separate circulator and R845 relay for each zone
• Electrical burner rating: 7.4 amp at 120 VAC, 3.7 amp at 240 VAC full load; 44.4 amp at 120 VAC, 22.7 amp at 240 VAC locked rotor
• Electrical circulator rating: 7.4 amp at 120 VAC, 3.7 amp at 240 VAC full load; 44.4 amp at 120 VAC, 22.2 amp at 240 VAC locked rotor

• Immersion-type controllers that combine high limit protection with low limit and circulator control in forced hydronic heating systems
• Require 24 VAC thermostat with heat anticipator set at 0.2 amp (plus current draw of gas valve on L8124E)
• Include diaphragm powerhead and micro Switch assembly that respond to temperature changes in boiler water
• Mount directly to boiler
• Provide multi-zone control by using a separate circulator and R845 relay for each zone
• Electrical burner rating: 7.4 amp at 120 VAC, 3.7 amp at 240 VAC full load; 44.4 amp at 120 VAC, 22.2 amp at 240 VAC locked rotor
• Electrical circulator rating: 7.4 amp at 120 VAC, 3.7 amp at 240 VAC full load; 44.4 amp at 120 VAC, 22.2 amp at 240 VAC locked rotor
• Includes 3" insertion well and ground screw

Honeywell C317-2B

• Immersion-type controllers that combine high limit protection with low limit and circulator control in forced hydronic heating systems
• Require 24 VAC thermostat with heat anticipator set at 0.2 amp (plus current draw of gas valve on L8124E)
• Include diaphragm powerhead and micro Switch assembly that respond to temperature changes in boiler water
• Mount directly to boiler
• Provide multi-zone control by using a separate circulator and R845 relay for each zone
• Electrical burner rating: full load - 7.4 amp at 120 VAC line voltage, 3.7 amp at 240 VAC; locked rotor - 44.4 amp at 120 VAC line voltage, 22.7 amp at 240 VAC
• Electrical circulator rating: 7.4 amp at 120 VAC, 3.7 amp at 240 VAC full load; 44.4 amp at 120 VAC, 22.2 amp at 240 VAC locked rotor Honeywell L8124G1020 High Limit Triple Aquastat Relay, 120 VAC at 60 Hz, SPSTSid Harvey Item #:C317-8: Replaces Part #:'s : C318-8R,
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• Immersion-type controllers that combine high limit protection with low limit and circulator control in forced hydronic heating systems, including domestic hot water service
• Require 24 VAC thermostat with heat anticipator set at 0.2 amp (plus current draw of gas valve on L8124E)
• Include diaphragm powerhead and micro Switch assembly that respond to temperature changes in boiler water
• Mount directly to boiler
• Provide multi-zone control by using a separate circulator and R845 relay for each zone
• Electrical burner rating: 1.25 amp at 24 VAC; 30 VA (total load) terminals B1-B2 and TV-Z
• Electrical circulator rating: at full load: 7.4 amp at 120 VAC, 3.7 amp at 240 VAC; at locked rotor: 44.4 amp at 120 VAC, 22.2 amp at 240 VAC

honeywell tr21-a

• Fast fill feature
• Built-in check valve
• Fill valve has 1/2" internal NPT threads and external union threads on both input and output sides
• 1/4" NPT port on side for optimal gauge
• Manual shut off valve on bottom
• Includes union nut, sweat and threaded tailpiece

Resideo Braukmann FM911

• 0 - 10 VDC modulating output for driving a modulating/condensing boiler
• Displays outdoor temperature on all AQ1000 thermostats when used with the included AQ12C10 outdoor sensor
• Customizable control settings allow for greater control and comfort, domestic hot water priority and priority override protection, as well as an automated test and purge feature
• Intuitive and accessible programming interface and central program of zone set points and setback programming
• Zoning control for up to four zones and can be up to 64 zones using expansion panels, test and purge feature for quick start-up and simplified troubleshooting
• Boiler short cycling protection, boiler post purge and boiler shock prevent from cold water returning to boiler
• 10 sec to 30 min off boiler heat post purge
• 30 sec per 2 weeks of space heating inactivity pump/valve exercise
• Heat demand (thermostat R-W), auxiliary demand and DHW demand, external dry contacts connection only
• Low voltage, class II, 2-wire polarity-insensitive, digital communicating link to other control or zoning modules

Resideo TK300-30A-1FM